Physical performance is based on supporting physiology (blood flow, oxygen, nitric oxide) rather than simple nervous stimulation (caffeine, tingling sensations).

noli's read

The post highlights an important distinction between nervous system excitation and physiological optimization. Regarding citrulline, meta-analyses (e.g., Journal of the International Society of Sports Nutrition) confirm its efficacy in increasing arginine levels and potentially improving endurance through better vasodilation, which supports the claim. Pomegranate extract is also recognized in several randomized studies for its benefits on vascular function and recovery. It is, however, fair to note that stimulants like caffeine, while not centered on blood flow, possess a solid evidence base (meta-analyses) for truly improving perceived performance and strength. The idea that tingling (beta-alanine) or increased heart rate are not indicators of performance is a relevant wellness perspective, as these side effects do not necessarily correlate with greater muscular power. In short, the advice points toward a more sustainable approach that is less focused on systemic stress.

the sources

No named source held this one up — that absence is part of the verdict.